<!DOCTYPE html>
<html lang="zh-CN">
    <head>
        <meta charset="UTF-8" />
        <title>13_CSS3-新增单位-vmax-vmin</title>
        <style>
            div {
                width: 50vmin;
                height: 50vmax;
                background-color: aqua;
            }
        </style>
    </head>
    <body>
        <div></div>
    </body>
</html>